How-ToHow-To iTunes Remote via Web Browser
HOW-TO:
NOTE: YOU CAN USE ANY BROWSER ON ANY OS TO CONTROL iTunes BUT YOU CAN ONLY SET IT UP ON MAC - THIS WILL NOT WORK ON WINDOWS CAUSE YOU DON'T HAVE THE UNIX COMMANDS TO CONTROL IT.
WARNING: THIS MAKES SECURITY RISKS ON YOUR COMPUTER!
Step 1 - Modify httpd.conf
1) Open Terminal and locate to the patch /etc/httpd type in sudo pico httpd.conf
A lot of these things you'll have to find within httpd.conf - but after you do one, it'll be next down the line:

Take the # off of LoadModule php4_module libexec/httpd/libphp4.so
Take the # off of AddModule mod_php4.c
Find:
#
User www
Group www

and change it to
#
User your_short_username #mine is sbarn
Group staff

Find:

DirectoryIndex index.html

Add a space after index.html and add index.php
Hit Control O to bring up the save file at the bottom, hit enter then control X to exit.

Next type:

sudo apachectl graceful

Now for Step 2 - Creating the PHP File
2)I'm changing this site so you guys can make it just that awesome, here's the code that you place in the index.php - I cut the image from iTunes via Command + Shift + 4 - here's the entire code:

--notice what I commented out - read what the lines say, if you're webs server isn't where I have it (via /Library/WebServer/Documents) you need to change a few things then 2 lines that say that thing, change it to the location of your server, these lines:
$data = file_get_contents("/Library/WebServer/Documents/volume.txt");

$logfile = fopen("/Library/WebServer/Documents/volume.txt",'w');

Now in your terminal, type this (you may need to change /Library... to the location of your web server:
cd /Library/WebServer/Documents
pico volume.txt
Control+O
Enter
Control+X

Now type in: sudo chmod 777 volume.txt

Step 3 Test to see if it works:
3) Type into Safari, or whatever browser you want to use: ip_address/index.php
YAY IT SHOULD WORK =D, here is a link to the image I used for the functions: MISSING RIGHT NOW

The volume icons control the volume - the next and previous control the track - the play button controls play and pause.